HJ-GTC Series PV Grid-Tie Cabinet / Box
220V / 380V AC / Type II Surge Protection / IP65
The HJ-GTC Series PV Grid-Tie Box (AC Combiner Box) is the vital safety and synchronization interface between solar string inverters and the utility grid. Engineered to seamlessly aggregate AC power, it provides dedicated PV-grade circuit breaking, robust active isolation, and premium Type II surge protection. Housed in a weatherproof IP65 enclosure, it ensures your distributed solar plant delivers clean, safe, and compliant power to the grid.
Ideal for Distributed Solar Integration:
- ✓ Commercial & Industrial (C&I) Rooftop Solar
- ✓ Residential Solar PV Systems
- ✓ Distributed Ground-Mounted Solar Arrays
- ✓ Hybrid Microgrids & Energy Storage Systems
1. Dedicated PV-Grade Circuit Protection
Unlike standard distribution boxes, the HJ-GTC utilizes specialized PV-rated grid-tie circuit breakers and highly visible pull-ring isolation switches. This ensures rapid and absolute physical disconnection between the solar generation system and the grid during maintenance or grid fault scenarios, strictly preventing dangerous islanding effects.
2. Premium Type II AC Surge Defense
Safeguard your expensive string inverters from grid-side voltage spikes and atmospheric electrical surges. The integrated Type II AC Surge Protection Device (SPD) features an ultra-fast response time of under 25ns and handles maximum discharge currents (Imax) up to 40kA, clamping hazardous overvoltages down to safe levels (< 1.8kV).
3. IP65 Extreme Weather Resilience
Engineered for relentless outdoor exposure. The enclosure is constructed from heavy-duty cold-rolled steel, treated with anti-corrosion and UV-resistant coatings. Featuring strict IP65 sealing for the main body and IP66 rated cable glands, it offers total immunity against heavy rain, dust ingress, and intense solar radiation.
4. Simplified & Foolproof Installation
Designed with the EPC installer in mind. The internal layout is highly organized and spacious, offering intuitive cable routing for both single-phase and three-phase systems. Standardized wall-mounting brackets allow for rapid deployment right next to the inverters, drastically cutting down on-site labor costs.
Global Factory Acceptance & Turnkey Support
Every HJ-GTC unit undergoes rigorous extreme-temperature stress testing and precise dielectric withstand checks before leaving our facility. We deliver the panels as fully pre-wired, ready-to-mount Completely Built Units (CBU), ensuring seamless and safe grid synchronization for your solar projects worldwide.
Technical Specifications
(Note: Parameters cover standard configurations for both Single-Phase and Three-Phase systems. Specific breaker capacities and enclosure dimensions are customizable based on the exact inverter output ratings.)
| System Compatibility | Single-Phase / Three-Phase Solar Systems |
| Rated Operating Voltage (Un) | 220V AC (Single-Phase) / 380V AC (Three-Phase) |
| Maximum Input Voltage (Uc) | 275V AC / 460V AC |
| Nominal Discharge Current (In) | 20kA |
| Maximum Discharge Current (Imax) | 40kA |
| Voltage Protection Level (Up) | < 1.8kV |
| Surge Protection Response Time | < 25 ns |
| Internal Protection Elements | PV-Grade Grid-Tie Breakers, Pull-Ring Isolation Switches, Type II SPD |
| Enclosure Protection Degree | IP65 (Main Enclosure) / IP66 (Cable Glands) |
| Enclosure Material | Cold-Rolled Steel (Outdoor Powder Coated) |
Extreme Operating Environment
- Ambient Temperature: -40°C to +85°C.
- Altitude: ≤ 2500m.
- Relative Humidity: ≤ 95%, without condensation.
- Installation Requirements: Designed for outdoor wall-mounting, free from highly corrosive gases.
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